package main

import (
	"fmt"
	"time"
)

func createWorker(id int) chan<- int {
	c := make(chan int)
	go worker(id, c)
	return c
}

func worker(id int, c chan int) {
	// 	for {
	// 		n, ok := <-c
	// 		if !ok {
	// 			break
	// 		}
	// 		fmt.Printf("Worker %d received %d\n", id, n)
	// 	}

	for n := range c {
		fmt.Printf("Worker %d received %d\n", id, n)
	}
}

func chanDemo() {
	// var c chan int // c == nil
	// c := make(chan int)
	var channels [10]chan<- int

	for i := 0; i < 10; i++ {
		// channels[i] = make(chan int)
		// go worker(i, channels[i])
		channels[i] = createWorker(i)

	}

	// go worker(0, c)
	for i := 0; i < 10; i++ {
		channels[i] <- 'a' + i
	}

	for i := 0; i < 10; i++ {
		channels[i] <- 'A' + i
	}

	time.Sleep(1)
}

func bufferedChannel() {
	c := make(chan int, 3)
	go worker(0, c)
	c <- 'a'
	c <- 'b'
	c <- 'c'
	c <- 'D'

	time.Sleep(1)
}

func chanClose() {
	c := make(chan int, 3)
	go worker(0, c)
	c <- 'a'
	c <- 'b'
	c <- 'c'
	c <- 'D'
	close(c)
	time.Sleep(time.Millisecond)
}

func main() {
	chanDemo()
	// bufferedChannel()
	// chanClose()
}
